I think Harvey failed to explain the tire mounting procedure correctly (but I am sure he does it correctly) With one bead of the tire on the rim insert the tube (I put a small amount of air in it so it is not flat) then starting AT THE VALVE push the valve in (you want the round base of the tube up inside the tire)and begin installing the other side(bead) of the tire. This way the valve ends up straight , you install away from the valve on both sides moving towards the other side of the wheel. So repeating you start AT THE VALVE and work away on both sides My Dad showed me this is 1963 or so. Back then we did mainly tubes with rubber stems (Schrader)
BOB FREITAS
MILL VALLEY, CA USA